Class ParseProcessor

lantz/processors.py:227–248

Processor to convert/parse the function parameters. The syntax is equal to `Processor` except that strings are interpreted as a :class:Parser expression. >>> conv = ParseProcessor('spam {:s} eggs') >>> conv('spam ham eggs') 'ham' >>> conv = ParseProcessor((

class ParseProcessor(Processor):
    """Processor to convert/parse the function parameters.

    The syntax is equal to `Processor` except that strings are interpreted
    as a :class:Parser expression.

        >>> conv = ParseProcessor('spam {:s} eggs')
        >>> conv('spam ham eggs')
        'ham'

        >>> conv = ParseProcessor(('hi {:d}', 'bye {:s}'))
        >>> conv(('hi 42', 'bye Brian'))
        (42, 'Brian')

    """

    @classmethod
    def to_callable(cls, obj):
        if isinstance(obj, str):
            return Parser(obj)
        raise TypeError('parse_params argument must be a string or a callable, '
                        'not {}'.format(obj))


class MapProcessor(Processor):